US 4,007,416 A · Voltage regulating transformer

Abstract

A voltage regulating transformer is disclosed which includes a magnetic core and a primary winding connectable to an alternating current source for inducing an alternating magnetic flux in the magnetic core. The secondary winding comprises a plurality of paired sectioned windings responsive to the magnetic flux in the magnetic core. Each pair of the plurality of paired sectioned windings has a first and a second foil with a dielectric interposed between the first and the second foils thus creating a plurality of capacitors. One pair of the plurality of paired sectioned windings has a different number of turns than the other of the plurality of paired sectioned windings creating a potential imbalance upon interconnection of the paired sectioned windings. The potential imbalance produces an oscillation within the secondary winding at a frequency which is an odd harmonic of the frequency of the alternating current source providing a reinforcement of the magnetic flux during a portion of each cycle producing a greater peak output voltage. The invention is suitable for use with high-intensity discharge lamp regulators or ballasts which require a substantially high starting voltage in order to ignite the lamp. The foregoing abstract is merely a resume of one general application, is not a complete discussion of all principles of operation or applications, and is not to be construed as a limitation on the scope of the claimed subject matter.

Claims18

Dependent claims

A voltage regulating transformer having load terminals for transferring power from an alternating current source to a load, comprising in combination:

a magnetic core;
a primary winding connectable to the alternating current source and wound about said magnetic core for inducing an alternating magnetic flux therein;
a secondary winding comprising a plurality of paired sectioned windings being wound around and responsive to said magnetic flux in said magnetic core;
means establishing capacitance between said plurality of paired sectioned windings;
means connecting said secondary winding to the load terminals;
and means for modifying said alternating magnetic flux in said magnetic core by harmonic magnetic flux to reinforce the magnetic flux therein at least during a portion of each cycle producing a greater output voltage to the load terminals.

3 more elements

A voltage regulating transformer having a first and a second load terminal for transferring power from an alternating current source to a load, comprising in combination:

a magnetic core having a magnetic shunt;
a primary winding connectable to the alternating current source and wound about said magnetic core for inducing an alternating magnetic flux therein;
a secondary winding separated by said magnetic shunt from said primary winding and comprising a plurality of paired sectioned windings and being wound around and responsive to said magnetic flux in said magnetic core;
each pair of said plurality of paired sectioned windings having a first and a second foil with each of said foils having a first and a second end;
one pair of said plurality of paired sectioned windings having a different number of turns than another pair of said plurality of paired sectioned windings;
dielectric means interposed between said first and second foils of each pair of said plurality of paired sectioned windings creating a plurality of capacitances;
means connecting said secondary winding to the first and second load terminals;
and means connecting said plurality of sectioned windings for modifying said alternating magnetic flux in said secondary portion of the magnetic core by harmonic magnetic flux to reinforce the magnetic flux therein during at least a portion of each cycle producing a greater peak output voltage to the load.

5 more elements

Dependencies are inferred from the claim text.

Voltage regulating transformer

Life of this patent

Voltage regulating transformer

Life of this patent

Abstract

Claims18